Abstract
The positive and negative-state bands of even-even Ba120-136 nuclei have been studied. The energy levels for the ground-state band of Ba120-136 have been calculated using Interacting Boson Model (IBM), Interacting Vector Boson Model (IVBM) and a new method called Semi-Empirical Formula (SEF). The negative parity band of even-even Ba120-136 isotopes has been also calculated using (IVBM) and (SEF). The gamma and beta-bands of even-even Ba120-136 isotopes have been calculated using IBM and SEF. The parameters of the best fit to the measured data are determined. The reduced transition probabilities B(E2) of these nuclei was calculated. The critical points have been determined for Ba-134,Ba-136 isotopes.
The potential energy surfaces for even-even Ba isotopes are studied using the simplified form of Interacting Boson Model (IBM) with an intrinsic coherent state. (C) 2016 Elsevier B.V. All rights reserved.